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DIGITAL HANDSET WITH KEYPAD AND SCREEN

₹0.00

General: The Digital Handset (DHS) is a handset equipped with a digital interface. It provides audio input/output along with control lines and features a display and keypad for an improved man-machine interface (MMI).

All necessary front panel controls and settings of the radio set can be operated through the DHS, which acts as a control extension of the radio. The primary purpose of the DHS is to extend the radio’s front panel controls to the handset, particularly when the radio is mounted on the soldier’s back.

General: The Digital Handset (DHS) is a handset equipped with a digital interface. It provides audio input/output along with control lines and features a display and keypad for an improved man-machine interface (MMI).

All necessary front panel controls and settings of the radio set can be operated through the DHS, which acts as a control extension of the radio. The primary purpose of the DHS is to extend the radio’s front panel controls to the handset, particularly when the radio is mounted on the soldier’s back.

Digital Handset (DHS) Specifications
Functional / Feature Specifications
Keypad Controls
  • Menu Keys: Up, Down, Left, Right, Enter, Escape, ON/OFF
  • Alphanumeric Keys: 0–9, A–Z
  • Key Type: Tactile keys for ease of operation
  • Total Number of Keys: 18
Power On/Off Operation
  • Power ON: Short press
  • Power OFF: Long press
Display
  • Size: 1.4-inch diagonal
  • Resolution: 128 × 64 pixels
  • Number of Rows Used: 5
PTT Switch Push To Talk
Power Source 5V nominal (negative ground)
Current Consumption 200mA Max
Radio On/Off Switch Radio ON/OFF switch used to remotely control the radio
Connector / Cable (DHS to Radio)
  • Connector Type: 13-pin / U-229/U
  • Supported Signals:
    • Audio
    • RS-232 communication
    • ON/OFF control
    • Selection logic
    • Power input
    • Ground (GND)
    • PTT (Push-to-Talk)
    • 2 × NC (Not Connected) pins
Electrical Specifications for Microphone Parameters
ELECTRICAL SPECIFICATIONS
PARAMETERS UNITS MIN TYP MAX
MICROPHONE SPECIFICATIONS
ELEMENT TYPE DYNAMIC
FREQUENCY RESPONSE Hz 300 3500
TEST CONDITIONS (PER 3QA000306)
REFERENCE 0 dBV = 1 Vrms/Pa
BIAS RESISTOR, Rb Ω N/A
TEST SOURCE MOUTH SIMULATOR, B&K 4227
TEST DISTANCE 0.25" FROM LIP RING
INPUT LEVEL dBSPL 94
MICROPHONE PERFORMANCE
DC RESISTANCE Ω 128 150 173
IMPEDANCE @ 1000 Hz Ω 135 159 183
SENSITIVITY @ 300 Hz dBV -78.7 -74.7 -70.7
SENSITIVITY @ 1000 Hz dBV -72.5 -68.5 -64.5
SENSITIVITY @ 3000 Hz dBV -66.2 -62.2 -58.2
DISTORTION (THD) 300 - 3500 Hz % 5.0
MICROPHONE PERFORMANCE (ORIGINAL)
TEST CONDITIONS
BIAS RESISTOR, Rb Ω N/A
TEST SOURCE MOUTH SIMULATOR, B&K 4227
TEST DISTANCE 0.25" FROM LIP RING
INPUT LEVEL dBSPL 103 dBSPL (28 DYNES/CM2)
SENSITIVITY @ 1000 Hz dBm -56.0
Speaker, PTT, Mechanical, and Environmental Specifications
SPEAKER SPECIFICATIONS
TEST CONDITIONS (PER 3QA000305)
ACQUISITION TRANSDUCER B&K 4153, ARTIFICIAL EAR
ACOUSTIC COUPLER H-250 #4 ADAPTOR
INPUT LEVEL Vrms 1.000
SPEAKER PERFORMANCE
DC RESISTANCE Ω 850 1000 1150
IMPEDANCE @ 1000 Hz Ω 876 1031 1185
OUTPUT LEVEL @ 300 Hz dBSPL 96 108 120
OUTPUT LEVEL @ 1000 Hz dBSPL 98 110 122
OUTPUT LEVEL @ 2000 Hz dBSPL 100 112 124
FREQUENCY RANGE Hz 100 3500
RATED INPUT POWER (CONTINUOUS) WATT 0.30
DISTORTION (THD) % 10
LOAD TEST 1,000 Hz SINE WAVE, 0.30 W INPUT, 8 HOUR DURATION RESPONSE SHALL BE WITHIN 3 dB OF INITIAL
PTT SWITCH
CYCLE LIFE CYCLES 2,000,000
RATING @ 12 VDC mA 50
MECHANICAL SPECIFICATIONS
MASS lbm 2
CABLE PULL FROM HANDSET, AXIAL lbf 40
CABLE PULL FROM CONNECTOR, AXIAL lbf 25 40
CABLE FLEX AT HANDSET (2 lbm WT.) CYCLES 25,000
CABLE ELONGATION (3:1) CYCLES 15,000
ENVIRONMENTAL SPECIFICATIONS
OPERATING TEMP. F [°C] -40 [-40] 149 [65]
STORAGE TEMP. F [°C] -67 [-55] 158 [70]
THERMAL SHOCK 2 HRS @ -40 / 2 HRS @ +158, SIX CYCLES, 24 HRS TOTAL
HUMIDITY METHOD 507.5, PROCEDURE I, CYCLIC HIGH, B2 FOR 6 CYCLES, FOLLOWED BY A 24 HR DRY OUT
ALTITUDE 50 Kft FOR 2 HOURS, FOLLOWED IMMEDIATELY BY 2 HRS @ 10 Kft.
IMMERSION 1 METER FOR 2 HRS (24 HOUR RECOVER ALLOWABLE)
VIBRATION MIL-STD-202, METHOD 201; 2 HRS IN EACH OF 3 PLANES