Hytera HP31X/HP36X/HP21X/HP28X Portable Radio
Quick Reference Guide
Brand: Hytera
1. Product Layout
This section details the physical layout and components of the Hytera HP31X, HP36X, HP21X, and HP28X portable radios.
HP36X: A portable radio with controls on the front, side, and top.
HP31X: A portable radio with controls on the front, side, and top.
HP28X: A portable radio with controls on the front, side, and top.
HP21X: A portable radio with controls on the front, side, and top.
| No. | Part Name | No. | Part Name | No. | Part Name |
|---|---|---|---|---|---|
| 1 | Channel Selector Knob | 10 | Microphone | 19 | P2 Key* |
| 2 | Push-to-Talk (PTT) Key | 11 | LCD Display | 20 | P3 Key* |
| 3 | Volume UP Key | 12 | OK/Menu Key | 21 | Keypad |
| 4 | Volume Down Key | 13 | Up Key | 22 | Accessory Connector |
| 5 | Side Key 3 (SK3)* | 14 | Back Key | 23 | USB Type-C Port |
| 6 | HP36X/HP28X: Top Key (TK)* HP31X/HP21X: On-Off Key | 15 | On-Off Key | 24 | Strap Hole |
| 7 | Antenna | 16 | Down Key | 25 | Belt Clip |
| 8 | LED Indicator | 17 | Contact Key | 26 | Battery |
| 9 | Speaker | 18 | P1 Key | 27 | Charging Contacts |
NOTE: For details about programmable keys (*), contact your dealer. Figures in this guide are for reference only.
2. Basic Operations
2.1 Charging the Battery
CAUTION: Read the Safety Information Booklet before charging. Use the approved charger. Lithium-ion battery power is limited to 30% for shipment per IATA regulations. Use the charger with the battery alone or attached to the radio (applies to HP36X, HP31X, HP28X). The LED indicator on the charger shows status. Use the USB Type-C cable to connect the radio to a power adapter, power bank, or PC. The LED indicator on the radio shows charging status:
| Status | Description |
|---|---|
| Glows red | The battery is being charged. |
| Flashes red rapidly | The battery fails to be charged. |
| Glows green | The battery is fully charged. |
2.2 Turning On or Off the Radio
Long press the [On-Off Key].
2.3 Adjusting the Volume
Press the [Volume UP Key] to increase volume or [Volume Down Key] to decrease volume.
2.4 Selecting a Zone
Press the preprogrammed [Zone Up] or [Zone Down] key. Alternatively, go to Menu > Zone to select a zone (applies to HP36X and HP28X).
2.5 Selecting a Channel
Rotate the [Channel Selector Knob].
2.6 Call Services
To maintain audio quality, keep your mouth 2.5 to 5 cm from the microphone.
2.6.1 Initiating a Call on Digital Channel
NOTE: This feature is available only for HP36X and HP31X.
- Rotate the [Channel Selector Knob] to select the digital channel, then press and hold the [PTT Key].
- Go to Menu > Contacts/CallLogs to select a contact, then press and hold the [PTT Key] (applies only to HP36X).
2.6.2 Initiating a Call Without Signaling on Analog Channel
- Rotate the [Channel Selector Knob] to select the analog channel.
- Press and hold the [PTT Key].
3. Status Indications
3.1 LED Indicator
| Status | Description | Remarks |
|---|---|---|
| Flashes green | The radio is being turned on. | |
| Glows red | The radio is transmitting. | |
| Glows green | The radio is receiving. | |
| Flashes red slowly once every 1 minute | The battery power is low. | |
| Flashes orange slowly | The radio is scanning. | |
| Glows orange | The call is on hold. | |
| Glows green for 2 seconds | The battery power is high. | |
| Glows orange for 2 seconds | The battery power is medium. | Available only for HP31X and HP21X. |
| Glows red for 2 seconds | The battery power is low. |
3.2 LCD Icons
This feature is available only for HP36X and HP28X.
| Icon | Description |
|---|---|
| [Battery Level] | More bars indicate more remaining battery power. |
| [Battery Empty] | The battery power runs out. Recharge or replace the battery. |
| [No Signal] | The radio detects no signal. |
| [Signal Strength] | The number of bars indicates the signal strength. |
| [Low Power Mode] | The radio operates in low power mode. |
| [High Power Mode] | The radio operates in high power mode. |
| [Scanning] | The radio is scanning. |
| [Direct Mode] | Direct Mode: The radio transmits and receives directly. |
| [Repeater Mode] | Repeater Mode: The radio transmits and receives through a repeater. |
| [VOX Enabled] | The VOX feature is enabled. |
| [Speaker On] | The speaker is turned on. |
| [Silent Mode] | The radio operates in silent mode. |
| [Accessory Connected] | An accessory is connected. |
Regulatory Information
FCC Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.
ISED Canada Statement
This device complies with Innovation, Science and Economic Development Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
RF Exposure Information
The device has been tested and complies with SAR limits. Users can obtain Canadian information on RF exposure and compliance. SAR tests are conducted using standard operating positions accepted by the FCC/ISEDC with the device transmitting at its highest certified power level in all tested frequency bands. Although SAR is determined at the highest certified power level, the actual SAR level of the device while operating can be well below the maximum value. Before a new model device is available for sale, it must be tested and certified to the FCC/ISEDC that it does not exceed the exposure limit. Tests for each device are performed in positions and locations (worn on the body) as required by the FCC/ISEDC. For face-up, 25mm was used for test; this equipment should be installed and operated with minimum distance 25mm. For body worn operation, this device has been tested and meets the FCC/ISEDC RF exposure guidelines when used with an accessory designated for this product or when used with an accessory that contains no metal. Non-compliance with the above restrictions may result in violation of RF exposure guidelines.
Compliance Information
This radio complies with IEEE and ICNIRP exposure limits for occupational/controlled RF exposure environment at operating duty factors of up to 50% and is authorized by the FCC/ISEDC for occupational use only.
