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R.l. drake holdings, llc – Drake QM1000 Modular QAM Modulator User Manual

Page 8

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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