Motorola VRS750, Service Manual

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VHF VRS750 Performance Specifications
UHF VRS750 Performance Specifications
GENERAL TRANSMITTER RECEIVER
Model P2080 (136-174 MHz)
†
Number of Channels: 1, T1 = R1
Frequency: Programmable, Synthesized
Frequency Channel
Channel Spacing: 12.5/20/25 kHz
Operation Temp. Range: -30°C to +60°C
Primary Power: 13.8 VDC ± 20%,
Negative Ground
DC Current Drain (max): 120 mA Receive
500 mA Transmit @ 275 mW
1.10 A Transmit @ 2 W
Squelch Operation: Private-Line required for
repeater access
Duty Cycle: Intermittent per EIA at 275 mW
PPI Sample Time: 16 ms Typical
Singletone Encoder/Decoder:
Nominal 847.5 Hz
FCC Identifiers: AZ492FT3802 (P2080)
Industry Canada:
RF Power Out: 275 mW to 2 W tunable
Spurious and Harmonic Emissions:
-36 dBm < 1 GHz
-30 dBm > 1 GHz
Frequency Stability:
±2.5 ppm @ 25 kHz
±2.5 ppm @ 12.5 kHz
Modulation Limiting (Max):
±2.5 kHz @ 12.5 kHz
±4.0 kHz @ 20 kHz
±5.0 kHz @ 25 kHz
Audio Response: (from 6 dB/octave
pre-emphasis, 300 to 3000 Hz)
+1, -3 dB
Audio Distortion: 3% Typical @ 1 kHz,
60% maximum deviation
FM Hum and Noise: -40 dB
TX Attack Time: 32 ms Typical
Antenna Impedance: 50 ohms
Antenna Connector: mini-uhf
Intermodulation per EIA: 70 dB
Hum and Noise: -40dBm @ 25 kHz
-35dBm @ 12.5 kHz
Reference Sensitivity (typical):
0.28 µV (-118dBm) at 12 dB SINAD
Conducted Spurious Rejection: 70 dB
Adjacent Channel Selectivity:
60 dB @ 12.5 kHz
70 dB @ 25/30 kHz
Audio Response (0.3-3 kHz): +1 to -3 dB
Audio Distortion: 3% Typical @
Mobile Rated Audio*
Conducted Spurious Emissions:
-57 dBm <1 GHz
-47 dBm > 1 GHz
RX Attack Time: 60 ms Typical
*Typically 5 W in 8 ohms.
†
Consult the product catalog sheets (ECAT Price Pages) for a list of disallowed frequencies.
GENERAL TRANSMITTER RECEIVER
Model P2081 (403-470 MHz)
P2082 (450-512 MHz)
†
Number of Channels: 1, T1 = R1
Frequency: Programmable, Synthesized
Frequency Channel
Channel Spacing: 12.5/20/25 kHz
Operation Temp. Range: -30°C to +60°C
Primary Power: 13.8 VDC ± 20%,
Negative Ground
DC Current Drain (max): 120 mA Receive
700 mA Transmit @ 275 mW
1.20 A Transmit @ 2 W
Squelch Operation: Private-Line required for
repeater access
Duty Cycle: Intermittent per EIA at 275 mW
PPI Sample Time: 16 ms Typical
Singletone Encoder/Decoder:
Nominal 847.5 Hz
FCC Identifiers: AZ492FT4848 (P2081)
AZ492FT4849 (P2082)
Industry Canada:
RF Power Out: 275 mW to 2 W tunable
Spurious and Harmonic Emissions:
-36 dBm < 1 GHz
-30 dBm > 1 GHz
Frequency Stability:
±2.5 ppm @ 25 kHz
±2.5 ppm @ 12.5 kHz
Modulation Limiting (Max):
±2.5 kHz @ 12.5 kHz
±4.0 kHz @ 20 kHz
±5.0 kHz @ 25 kHz
Audio Response: (from 6 dB/octave
pre-emphasis, 300 to 3000 Hz)
+1, -3 dB
Audio Distortion: 3% Typical @ 1 kHz,
60% maximum deviation
FM Hum and Noise: -40 dB
TX Attack Time: 14 ms Typical
Antenna Impedance: 50 ohms
Antenna Connector: mini-uhf
Intermodulation per EIA: 70 dB
Hum and Noise: -40dBm @ 25 kHz
-35dBm @ 12.5 kHz
Reference Sensitivity (typical):
0.28 µV (-118 dBm) at 12 dB SINAD
Conducted Spurious Rejection: 70 dB
Adjacent Channel Selectivity:
60 dB @ 12.5 kHz
70 dB @ 25/30 kHz
Audio Response (0.3-3 kHz): +1 to -3 dB
Audio Distortion: 3% Typical @
Mobile Rated Audio*
Conducted Spurious Emissions:
-57 dBm <1 GHz
-47 dBm > 1 GHz
RX Attack Time: 60 ms Typical
*Typically 5 W in 8 ohms.
†
Consult the product catalog sheets (ECAT Price Pages) for a list of disallowed frequencies.