User's Manual

1
DR-445 SPECIFICATIONS
GENERAL
Frequency Range: 400.6 – 416.5, 411 – 429, or 450 - 470 MHz
RF Channels: 8 Independent TX/RX frequencies
Frequencies unusable in 406.6 – 416.5 MHz band: None- all 6.25 kHz steps available
Frequencies unusable
RX
in 411 - 429 MHz band
417.60000
418.03750
Unusable 6.25 kHz steps:
418.04375
418.05625
418.06250
Frequencies unusable
RX
in 450 – 470 MHz band
460.80000
461.23750
Unusable 6.25 kHz steps:
461.24375
461.25625
461.26250
Frequency Stability: +/-1.5 PPM (-30° to +60° C)
Tone/Code Signaling: CTCSS (Quiet Call) and DCS
Power Supply: 9 to 17 VDC
Current Drain:
RX Standby: 25 mA at 12.5 VDC
Dimensions & weight: Board only version: 4.75” x 2.8”x .625” 2.1 oz
Shielded version: 4.75” x 2.8”x .625” 3.4 oz.
Encased version: 5.7” x 3” x 1.375” 7.3 oz.
Antenna Fitting: BNC female with encased version. Other options available on board only version.
25 kHz Wide band
12.5 kHz Narrow band
Sensitivity (12 dB SINAD): 0.25 µV 0.25 µV
Adjacent channel: -67 dB -60 dB
Spurious rejection: -70 dB -70 dB
Image rejection: -75 dB -75 dB
Intermodulation: -67 dB -67 dB
FM hum and noise: -43 dB -37 dB
Conducted spurious: -57 dBm -57 dBm
Receiver attack time (TX to RX): < 10 ms < 10 ms
Noise squelch attack time: < 15 ms < 15 ms
(for 20 dB quieting)
RSSI squelch attack time: < 5 ms < 5 ms