MIPRO ACT-311, ACT-312, ACT-323, ACT-343 UHF Analog Receivers

⚠️ IMPORTANT SAFETY INSTRUCTIONS ⚠️

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or ground plug: A polarized plug has two blades with one wider than the other. The wide blade is provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plug, convenience receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
15. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
16. Apparatus should not be exposed to dripping or splashing and no objects filled with liquids, should be placed on the apparatus.
17. Use only with the battery which specified by manufacturer.
18. The power supply cord set is to be the main disconnected device.
19. Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.

WARNING

1. FOR OUTDOOR USE: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
2. UNDER WET LOCATION: Apparatus should not be exposed to dripping or splashing and no objects filled with liquids, such as vases should be placed on the apparatus.
3. SERVICE INSTRUCTIONS: CAUTION - These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.

[Caution: Risk of Electric Shock - Do Not Open] ⚠️ This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.

ⓘ This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.

FC & IC - ID

This device complies with Part 15 of the FCC Rules and RSS-123 Issue 2 of Canada. Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device. This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment.

Disposal

[Recycle symbol] Dispose of any unusable devices or batteries responsibly and in accordance with any applicable regulations.

Disposing of used batteries with domestic waste is to be avoided! Batteries / NiCad cells often contain heavy metals such as cadmium(Cd), mercury(Hg) and lead(Pb) that makes them unsuitable for disposal with domestic waste. You may return spent batteries/accumulators free of charge to recycling centres or anywhere else batteries/accumulators are sold. By doing so, you contribute to the conservation of our environment!

Part Names and Front/Rear Panel Descriptions

The MIPRO ACT series includes the ACT-311 Single-Channel Receiver, ACT-312 Dual-Channel Receiver, ACT-323 Dual-Channel Receiver, and ACT-343 Quad-Channel Receiver. The following describes the front and rear panel components.

ACT-311 Single-Channel Receiver

Front Panel: Features a Power Switch (1), LCD Screen (2), Volume Control (3), SET Button (4), ACT Button (5), ACT Sync Port (6), Down Button (7) for decreasing parameter value, and Up Button (8) for increasing parameter value.

Rear Panel: Includes B/A Antenna Connector (9), DC Input Jack (10), Mixed Balanced Audio Output B XLR Connector (11), Mixed Unbalanced Audio Output B 6.3 Ø Phone Jack (12), Balanced and Unbalanced Volume Level Switch (13), and Balanced and Unbalanced Output Mixed Switch (14).

ACT-312 Dual-Channel Receiver

Front Panel: Similar to ACT-311, featuring Power Switch (1), LCD Screen (2), Volume Control (3), SET Button (4), ACT Button (5), ACT Sync Port (6), Down Button (7), and Up Button (8).

Rear Panel: Includes B/A Antenna Connector (9), DC Input Jack (10), Mixed Balanced Audio Output B XLR Connector (11), Mixed Unbalanced Audio Output B 6.3 Ø Phone Jack (12), Balanced Audio Output A XLR Connector (15), Unbalanced Audio Output A 6.3 Ø Phone Jack (16), Balanced Audio Output B XLR Connector (17), and Unbalanced Audio Output B 6.3 Ø Phone Jack (18). It also features Volume Level Switches (13) and Output Mode Switches (14) for balanced and unbalanced outputs.

ACT-323 Dual-Channel Receiver

Front Panel: Features a Power Switch (1), LCD Screen (2), Volume Control (3), SET Button (4), ACT Button (5), ACT Sync Port (6), Down Button (7), and Up Button (8).

Rear Panel: Similar to ACT-312, including B/A Antenna Connector (9), DC Input Jack (10), Mixed Balanced Audio Output B XLR Connector (11), Mixed Unbalanced Audio Output B 6.3 Ø Phone Jack (12), Balanced Audio Output A XLR Connector (15), Unbalanced Audio Output A 6.3 Ø Phone Jack (16), Balanced Audio Output B XLR Connector (17), and Unbalanced Audio Output B 6.3 Ø Phone Jack (18). It also features Volume Level Switches (13) and Output Mode Switches (14) for balanced and unbalanced outputs.

ACT-343 Quad-Channel Receiver

Front Panel: Features a Power Switch (1), LCD Screen (2), Volume Control (3), SET Button (4), ACT Button (5), ACT Sync Port (6), Down Button (7), and Up Button (8).

Rear Panel: Includes B/A Antenna Connector (9), DC Input Jack (10), Mixed Balanced Audio Output B XLR Connector (11), Mixed Unbalanced Audio Output B 6.3 Ø Phone Jack (12), Balanced Audio Output A XLR Connector (15), Unbalanced Audio Output A 6.3 Ø Phone Jack (16), Balanced Audio Output B XLR Connector (17), and Unbalanced Audio Output B 6.3 Ø Phone Jack (18). It also features Volume Level Switches (13) and Output Mode Switches (14) for balanced and unbalanced outputs.

Fig. 1: Receiver Panels

Illustrates the front and rear panels of the ACT-311, ACT-312, ACT-323, and ACT-343 receivers with numbered components.

Receiver Installation

Fig. 2: Rear Panel Connections

The rear panel of the receivers features several connection ports:

• Antenna Connection (9): Connect an antenna to each of the antenna connectors. These connectors provide an 8-volt DC bias to work with MIPRO antenna boosters. If the antenna cable is longer than 10 meters, an antenna booster is recommended for optimal reception.
• Power Connection (10): Connect the power supply to the DC input jack and plug it into an AC power source. The DC input voltage range is 12-15V.
• Audio Output Connection:
  • Balanced XLR Output (11, 15, 17): For connecting to a mixer or amplifier's MIC IN jack, set the output level switch (13) to 0 dB. For LINE IN jack, set to +16 dB.
  • Unbalanced 6.3 Ø Phone Jack Output (12, 16, 18): For connecting to a mixer or amplifier's LINE IN jack, set the output level switch (13) to +10 dB.
  • Non-standard Gain Amplifier: If connecting to an amplifier with non-standard gain and distortion occurs at maximum output, set the output level switch (13) to -6 dB.
  • Electric Guitar/Bass Output: Use a 6.3 Ø phone cable. Connect one end to the receiver's unbalanced output jack and the other end to the guitar/bass amplifier's input jack. Set the output level switch (13) to "+10 dB".
  • Mixed Output: Connect to the mixed output jacks (indicated by specific labels on the panel) and set the output switch (14) to the MIX position to combine multiple channel outputs.

Fig. 3 illustrates the mixed output connections. Fig. 4 provides a 3-pin XLR connector wiring diagram (Pin 1: GND, Pin 2: HOT+, Pin 3: COLD).

Receiver Operation

1. Before turning on the receiver, ensure all transmitters are powered off and the mixer's volume control is set to a minimized setting. When the receiver is turned on and the LCD screen glows, it is working normally.
2. RF Meter Level (7): The RF meter glows when a transmitter is powered on. Once an audio signal is received, the AF meter glows in accordance with signal strength. If the RF indicator or AF meter does not glow, adjustment or repair may be required.
3. Microphone Volume (For ACT-311/ACT-312 only): Microphone volume is adjusted at the amplifier or mixer. No adjustment is needed at the receiver.

Rackmount Installation for Receivers

Fig. 5 shows the process of installing receivers into rackmount kits.

Fig. 6 illustrates optional receiver rack-mount kits: a half-rack kit and a full-rack kit.

1. Fasten the receivers on an EIA standard 19-inch rack case.
2. For ideal reception range, install the receiver at least 1 meter above the ground and away from EMI/RFI "noise" sources. Place the transmitter at least 1 meter away from the receiving antenna. Fig. 7 and Fig. 8 show recommended placement for antennas and transmitters.
3. Proper installation of antennas affects the operating efficiency of the receiver. The main principle is to minimize the distance between the receiving antenna and transmitter for best reception quality.
4. Use MIPRO supplied antennas to ensure proper receiver sensitivity.
5. The antenna connector provides an 8V DC bias output. Short circuits should be avoided.
6. Install MIPRO directional antennas and boosters if extended reception distance is required.
7. Use the antenna distributor in multiple channel wireless systems to simplify antenna installation and improve receiving efficiency.
8. For multiple wireless systems operations, it is recommended to select MIPRO's factory preset interference-free channels within the same group to ensure optimum performance.

LCD Screen and Settings

Fig. 9: LCD Screen Layout

The LCD screen displays various parameters:

• Antenna A/B Indicator (10): Shows antenna status.
• Group (20): Displays the current group.
• Channel (21): Displays the current channel.
• Frequency (22): Displays the operating frequency.
• Lock Mode (23): Indicates if the panel is locked.
• Interference Warning Indicator (24): Alerts to potential interference.
• Squelch Meter (25): Shows squelch level.
• Transmitter Battery Meter (26): Indicates transmitter battery status.
• RF Signal Meter (27): Displays RF signal strength.
• Audio Signal Meter (28): Displays audio signal strength.
• Group/Channel/Frequency Display (29): Main display area for current settings.

Receiver Parameters and Programming

Use the SET button (4) to select one of 4 functions: GROUP, CHANNEL, FREQUENCY, and SQUELCH. Use the ▼ (7) or ▲ (8) buttons to program parameters. Fig. 10 illustrates the function selection sequence.

(A) GROUP Setting (Fig. 11)

1. Press the 'SET' button until both the GROUP cursor and a group number start blinking, indicating readiness for parameter change.
2. During blinking, press ▼ or ▲ to select one of the factory preset groups.
3. Group numbers and cursor are blinking during this process.

(B) CHANNEL Setting (Fig. 12)

1. Press the 'SET' button until both the CH cursor and a channel number start blinking.
2. During blinking, press ▼ or ▲ to select one of the factory preset channels. Channel numbers change sequentially (e.g., 01, 02, 03... up to 08 or 16 depending on the group).

(C) FREQUENCY Display (Fig. 13)

Press the 'SET' button to locate the FRQ cursor. The screen displays the frequency of the preset channel. Group 7 is designated for user-defined frequency programming; other groups list frequencies corresponding to preset channels and cannot be programmed.

(D) FREQUENCY Setting (Fig. 14)

1. Press the 'SET' button until the GRP cursor blinks. Press ▼ or ▲ to select group 7 (frequency band dependent).
2. Press the 'SET' button again to select the desired channel (01-16, frequency band dependent).
3. Press the 'SET' button to the FRQ cursor. Press 'SET' again. The first 3 numbers start blinking, ready for parameter change.
4. Press ▼ or ▲ to move down or up by 1 MHz step.
5. Press the 'SET' button again. The last 3 numbers start blinking, ready for parameter change.
6. Press ▼ or ▲ to move down or up by 25 kHz step.

(E) SQUELCH Setting (Fig. 15)

1. Press the 'SET' button until the SQ cursor starts blinking.
2. During blinking, press ▼ or ▲ to increase or decrease the squelch level. A decreased SQ level setting results in higher sensitivity and a longer reception range.

(F) Lock & Unlock Receiver Panel (Fig. 16)

A lock icon appears on the display when the panel is locked.

1. To Lock: Press and hold the 'SET' button until the lock icon appears. The display panel is locked, and parameters cannot be changed.
2. To Unlock: Press and hold the 'SET' button until the lock icon disappears.

(G) ACT Sync Setting (Fig. 17)

This feature facilitates simple frequency synchronization between the receiver and transmitter.

1. Press the ACT button. The GRP/CH numbers start blinking, indicating the synchronization process has begun.
2. Ensure the transmitter is powered on. Align the ACT IR port of both the transmitter and receiver within 30 cm (12 inches).
3. Once synchronization is complete, the ACT function stops automatically, and the RF meter glows fully. The transmitter's LCD also displays the same group and channel as the receiver.

Battery Meter (Fig. 18)

The 'BA' indicator displays the remaining battery life in percentage (%). Replace batteries when the indicator falls to 10% (1 indicator remaining).

Error Messages and LCD Backlight

• Error Message: ERR01 indicates an internal data error.
• LCD Backlight Display Status: The backlight deactivates automatically if no controls are pressed for 5 seconds. A half-lightened display indicates standby status (activated if no transmitter signal is received or controls are not pressed for 10 seconds). The LCD screen will be fully lightened when transmitter signals are received or function controls are pressed.

General Information

• Design and specifications are subject to change without prior notice. Refer to the actual product for any discrepancies.
• Frequency range, output power, and maximum deviation must adhere to local telecom regulations.

Manufacturer Information

MIPRO Electronics Co., Ltd

Headquarters: No. 814, Beigang Rd., Chiayi City 600079, Taiwan

Tel: +886.5.238.0809

Fax: +886.5.238.0803

Email: mipro@mipro.com.tw

Website: www.mipro.com.tw

All rights reserved. Do not copy or forward without prior approvals of MIPRO. Specifications and design subject to change without notice.