3
rd
Generation Rack-
Mount RDMS™
7
Quasonix, Inc.
2 Specifications
Characteristic
Specification
Receiver Section
Type
Dual-conversion superheterodyne
Input RF Frequency
Refer to section 1.2.3
Tuning resolution
Tunes in 62.5 kHz increments, to the 70 MHz IF output, after the 70 MHz IF output,
receiver tunes in increments of less than 1 Hz
Frequency stability
1 ppm over temperature; 1 ppm per year aging
Reference oscillator
20 MHz
Noise figure
3.5 dB (typical), 5 dB (maximum)
LO phase noise, measured at 70
MHz IF output
-115 dBc/Hz @ 1 MHz offset
Maximum RF input
+20 dBm (+10 dBm for C-band)
Available gain (to 70 MHz IF
output)
114 dB
Gain control
128 dB control range; User selectable: AGC or MGC (AGC freeze)
AGC load impedance
1 KOhm
AGC time constant
Adjustable to any value from 0.1 ms to 1000 ms
First IF bandwidth
60 MHz (nominal)
IF rejection
> 90 dB
Image rejection
70 dB
RF input impedance
50 ohms
VSWR
3:1 Max; 2:1 Typical
Second IF Section
IF frequency
70 MHz
IF output level, nominal
(AGC mode)
Channel 1 and 2: 70 and 250 kHz bandwidths: -15 dBm
0.5
–
4.5 MHz bandwidths: -10 dBm
6 and 10 MHz bandwidths: -5 dBm
14
–
40 MHz bandwidths: -15 dBm
Combiner: -5 dBm
Channel 1 and 2 Mod Out: -5 dBm
(3U RDMS only)
IF output impedance
50 ohms
VSWR
2:1 Max; 1.5:1 Typical
IF bandwidths
250 kHz, 500 kHz, 1 MHz, 2 MHz, 4.5 MHz, 10 MHz, 20 MHz, 40 MHz. Automatic
selection based on modulation type and data rate, with manual override.
Optional: 70 kHz, 1.4 MHz, 3 MHz, 6 MHz, 14 MHz, 28 MHz
Playback Demodulator IF In, Channel 1 and 2 Section
Input Center Frequency
75 kHz
–
20 MHz, 70 MHz through any selectable SAW filter
Input Level
-30 dBm + 10 dB
Input Impedance
50 ohms, nominal
