Transcript
TECHNICAL
DATA
AND
DRAKE QM1000 MODULAR QAM MODULATOR
SPECIFICATIONS 1002572
QM1000 Specifications:
Modulation Modes:
64QAM, 256QAM or CW selected via front panel slide switch.
Symbol Rate:
5.056941MS/S for 64QAM, 5.360537MS/S for 256QAM
FEC:
ITU-B
Interleaver Modes:
I128-J1, I128-J2, I64-J2, I128-J3, I32-J4, I128-J4, I16-J8, I128-J5, I8-J16, I128-J6, I4-J32, I128-J7, I2-J64, I128-J8, or I1-J128. Selected via rear panel DIP switch
I/Q Phase Error:
< 1 degree
Carrier Suppression:
> 40 dB
Channel Amplitude Error:
< 0.5 dB
MER:
> 40 dB with blind equalizer
Output Frequency Range:
44 MHz to 1000 MHz
Channel Plan:
Standard CATV and 44 MHz IF mode(channel 000)
Frequency Stability:
± 2.5 ppM
Output Level:
+ 45 dBmV nominal. + 30 dBmV for 44 MHz IF mode
Output Adjustment Range:
± - 15 dB via front panel potentiometer. Output Level adjusts in 0.5 dB steps
Output Flatness:
± - 2 dB
Output Return Loss:
> 10 dB within output filter passband
Output Filter Ranges:
44 MHz to 1000 MHz 100 MHz to 150 MHz 150 MHz to 250 MHz 250 MHz to 450 MHz 450 MHz to 600 MHz 600 MHz to 1002 MHz
Spurious:
> - 60 dBc except 44 MHz IF mode where the 3rd harmonic is > - 35 dBc
Phase Noise:
> - 101 dBc at 10 KHz offset 1 KHz to 10 KHz = < - 55 dBc double sideband noise power 10 KHz to 50 KHz = < - 52 dBc double sideband noise power 50 KHz to 3 MHz = < - 48 dBc double sideband noise power
Adjacent Channel:
± 3.0 MHz to ± 3.75 MHz = > - 60 dBc in 750 KHz ± 3.75 MHz to ± 9.0 MHz = > - 59 dBc in 5.25 MHz ± 9.0 MHz to ± 15.0 MHz = > - 65 dBc in 6.0 MHz
Broadband Noise:
- 78 dBc in 6 MHz bandwidth
Power:
+ 12V @ 275 mA, + 5V @ 400 mA typical
Weight:
TBA
Size:
TBA
Operating Temperature:
0° to 50° Celsius
Note Concerning Operating Temperature:
If the operating temperature of the unit changes by more than 25 degrees Celsius the unit will recalibrate its internal synthesizer. This will cause a momentary interruption of the output
Specifications, price, and availability are subject to change without notice or obligation.
