1-3
1.5
TECHNICAL CHARACTERISTICS (continued)
MAIN RECEIVER
Sensitivity at 12 dB SINAD
Better than 0.35 µV
Adjacent Channel Selectivity
-70 dB (25 or 12.5 kHz)
Spurious Attenuation
-90 dB
Third Order Intermodulation
-70 dB
Image Attenuation
-80 dB
FM Acceptance
± 6 kHz
Hum and Noise
Better than 50 dB
Audio Distortion
less than 5%
Antenna Conducted Emission
less than -70 dBm
GUARD RECEIVER
All specifications identical to main receiver
TRANSMITTER
RF Power Output
1 watt or 10 watts
Output Impedance
50 ohms
Maximum Deviation
±5 kHz (25 kHz mode)
(In narrowband mode)
±2.5 kHz(12.5kHz mode)
Spurious Attenuation
-90 dB below carrier level
Frequency Stability
± 0.0005%
Microphone Circuit
Carbon or equivalent
Sidetone Output
0.5W (max) into 600
S
Harmonic Attenuation
-65 dB below carrier level
FM Hum And Noise
-40 dB
Audio Input
50 mV at 2.5 kHz into
200
S
input circuit for
±3.5kHz deviation, adjst.
Audio Distortion
Less than 5%
Summary of Contents for TFM-138
Page 13: ...2 2 FIGURE 2 1 Operator s Switches and Controls TFM 138 F10 B software...
Page 24: ...3 2 FIGURE 3 1 Outline Drawing for Model TFM 138 Transceiver...
Page 26: ...3 4 Figure 3 2 Wiring Connections for TFM 138 Transceiver...
Page 30: ...3 8 FIGURE 3 4 Microphone and Sidetone Level Main and Guard Squelch Adjustment Access Holes...
Page 42: ...STEP SYSTEM PASS FAIL NOTES A 11...
