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Revision A
November 25, 1996
The following are pertinent specifications for the FCC type-accepted Terra by Trimble Model
TX 760D transceiver.
1.3.1 MECHANICAL SPECIFICATIONS
Mounting: Panel mounted using mounting tray supplied with unit
Overall Dimensions: 13.05" long, 3.125" wide, 1.625" high (33.14 cm long, 7.9375
cm wide, 4.1275 cm high)
Mounting Dimensions: 11.45" behind panel,
3.125" wide, 1.625" high (29.08 cm behind panel, 7.9375 cm
wide, 4.1275 cm high)
Panel Cutout: 3.03" x 1.54" (7.692 cm x 3.9116 cm)
Weight: 1.50 pounds (0.680 kg)
Connectors: Antenna input/output; BNC Interconnect; 15 pin “D” type
1.3.2 POWER REQUIREMENTS
The Terra by Trimble TX 760D transceiver requires 13.75 VDC +10%, -20% input at
2.5 amps maximum load condition.
1.3.3 ENVIRONMENTAL SPECIFICATIONS
Maximum Operating Conditions
Altitude: To 30,000 feet (9,150 meters)
Humidity: To 95% at 50 C (122 F)
Temperature
Range: -20 C (-4 F) to +55 C (+131 F)
Vibration: 0.5 G from 5 to 500 Hz
1.3.4 ELECTRICAL SPECIFICATIONS
(All specifications at 13.75 VDC nominal)
RECEIVER
Frequency Range: 118.00 to 136.975 MHz
Number of Channels: 760
Channel Spacing: 25 KHz
Sensitivity: Less than 2 µV for 6dBm signal plus noise to noise ratio.
Selectivity: Typically -6dBm at 14 KHz and -60 dBm at 40 KHz.
Squelch Sensitivity: Automatic: 2 to 5 µV
Manual: 25 to 150 µV
Automatic Gain
Control (AGC): Audio flat within 3dB for 3 µV to 30,000 µV input.
Undesired Response: Greater than 60dBm down.
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