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TM 11-5820-890-30-5
1-10. EQUIPMENT DATA.
RECEIVER-TRANSMlTTER, RADIO RT-1439/VRC
Audio input impedance
150 ohms
Audio input level
0.7 to 2.1 mV rms
Audio frequency response
300 to 3000 Hz
Audio distortion (max)
7 percent
Audio output power
50 mW
Sidetone level
3 to 9 dB below received audio level
Squelch tone
150 Hz (147 to 153 Hz)
Receive sensitivity
Audio, SC
Audio, FH
16 kb/s, SC
16 kb/s, FH
75 b/s to 4.8 kb/s, SC
75 b/s to 4.8 kb/s, FH
AD1 , SC
AD1 , FH
AD2, SC
AD2, FH
-116 dBm
-115 dBm
-116 dBm
-115 dBm
-116 to -112 dBm
-115 to -111 dBm
-112 dBm
-110 dBm
-117 dBm
-116 dBm
RF frequency accuracy
±3 PPM
Holding battery current drain (max)
Clock on
1.2 mA
Clock off
0.5 mA
Warm-up time (max at 20° to 30°C)
Operational (±50 PPM)
10 seconds
Specification (±3 PPM)
1 minute
1-11. SAFETY, CARE, AND HANDLING.
Safety hazards are present when testing and troubleshooting the equipment. Review the WARNINGS and
CAUTIONS in the front of this manual and in each maintenance chapter.
WARNINGS provide information on
safety hazards that can cause personal injury. The high voltage present during some of the tests can cause
death. CAUTIONS provide information of safety hazards that can cause equipment damage. Most of the
modules have integrated circuits that can be damaged by static electricity.
1-4
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