R.l. drake holdings, llc – Drake QM1000 Modular QAM Modulator User Manual
Page 8
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:
>40dB.
Channel amplitude error:
<0.5dB.
MER:
>40dB
with
blind
equalizer.
Output frequency range:
44MHz
to
1002MHz.
Channel plan:
Standard CATV and 44MHz IF mode(channel 000).
Frequency stability:
+/-
2.5ppM.
Output level:
+45dBmV nominal. +30dBmV for 44MHz IF mode.
Output adjustment range:
+/-15dB via front panel potentiometer. Output level adjusts in
0.5dB
steps.
Output flatness:
+/-2dB.
Output return loss:
>10dB within output filter passband.
Output filter ranges:
44MHz
to
100MHz
100MHz to 150MHz
150MHz to 250MHz
250MHz to 450MHz
450MHz to 600MHz
600MHz to 1002MHz
Spurious:
> -60dBc except 44MHz IF mode where the 3rd harmonic is
> -35dBc.
Phase noise:
>
-101dBc
at
10KHz
offset.
1KHz to 10KHz = < -55dBc double sideband noise power.
10KHz to 50KHz = < -52dBc double sideband noise power.
50KHz to 3MHz = < -48dBc double sideband noise power.
Adjacent channel:
+/- 3.0MHz to +/- 3.75MHz = > -60dBc in 750KHz.
+/- 3.75MHz to +/- 9.0MHz = > -59dBc in 5.25MHz.
+/- 9.0MHz to +/- 15.0MHz = > -65dBc in 6.0MHz.
Broadband noise:
-78dBc
in
6MHz
bandwidth.
Power:
+12V @ 275mA, +5V @ 400mA typical.
Weight:
TBM
Size:
TBM
Operating temperature range:
0 to 50 degrees 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.
8
SPECIFICATIONS
R.L. Drake Holdings, LLC
710 Pleasant Valley Drive
Springboro, OH 45066
(937) 746-4556
www.rldrake.com