User's Manual

Maximum Dimensions (L x W x H) 6.6” x 5.0” x 2.4” including connectors
Weight 35 oz.
2.2 TRANSMITTER( DTX-165)
Operating Bandwidth Up to the span of the sub-band
RF Output Power (internally adjustable) 5 to 30 watts
Duty Cycle 5 to 100 % depending upon ambient
temperature(see chart elsewhere in manual)
RF Load Impedance 50 ohms
Modulation Distortion (per TIA/EIA 603) 5 % max.
Modulation Frequency Response (+1/-3 dB, ref 1 kHz)
Narrowband wideband versions:
w pre-emphasis 400 Hz to 2500 Hz
w/o pre-emphasis 50 Hz to 2700 Hz
Very narrowband versions:
w/o pre-emphasis 50 Hz to 1200 Hz
Transmitter Attack Time: 10 ms max
Spurious and Harmonics -25 dBm max.
FM Hum and Noise
Verynarrow band (5/6.25/7.5 kHz) operation 40 dB min.
Narrowband (12.5/15 kHz) operation 45 dB min.
Wideband (25/30 kHz) operation 50 dB min.
Group Delay Variation (Within Frequency Response) 5 us max.
Current Drain Depends upon supply voltage
(see chart elsewhere in manual).
AUX IN adjustment range (60% rated dev.)
w pre-emphasis (@ 1 kHz) 200 to 1000 mV rms
w/o pre-emphasis (flat) 40 to 300 mV rms
2.3 RECEIVER (DTX-165)
Operating Bandwidth Up to span of the sub-band
Sensitivity (12 dB SINAD @ 1 kHz w de-emphasis) 0.25 uV (-119.0 dBm)
RF Input Impedance 50 ohms nominal
Adjacent Channel Selectivity
+/-6.25 kHz w very narrow IF 45 dB min.
+/- 12.5 kHz w narrow IF 60 dB min.
+/- 25 kHz w wide IF 70 dB min.
Spurious and Image Rejection
IF/2 60 dB min.
Image & other 70 dB min.
Intermodulation Rejection 68 dB min.