MODEL NUMBER:(R) 64020-250-1ADMDFS-A
SPECIFICATIONSDocument Number: 56A18993B
A Digital Frequency Synthesizer OEM Module with Analog and Digital Modulation input and a 1 Watt RF Output.
The unit can be used to generate a frequency chirp.
When specified as R64020-250-1ADMDFS-A, the unit delivered will be manufactured to be compliant with EU
Directive 2002/95/EC for Reduction of Hazardous Substance.

PARAMETERSPECIFICATION

Bandwidth:

20 – 250 MHz typical

Clock Frequency:

1000 MHz

Step Size:< 1 Hz with 30 Bits input

Frequency Settling Time:

310 ns Maximum

Power Out:

1 watt typicalHarmonic Distortion:

nd2 :
3rd:

-20 dBc Maximum-15 dBc Maximum

Analog Modulation:

0 to +1 volt Analog into 50 , +1volt = Full RF power output.

Digital Modulation:

TTL levels
TTL Active High = Full RF output power
TTL Active Low = Minimum RF output power
No Signal = Full RF output power (pulled high internally)

Rise and Fall Time:

20 ns

Extinction Ratio:
Digital:Analog:30 dB Minimum
40 dB Minimum

Reference Out:A reference signal from the un-modulated
output of the synthesizer. 0 dBm nominal

Applied Power:+ 28 volts DC @ 1 amp Maximum+ 3.3 volts DC @ 1 amp Maximum

Outline Drawing

53D3887

MAXIMUM RATINGS:
Ambient Temperature:

400 C

RF Output:

No DC Feedback

INPUT / OUTPUT CONNECTIONS:+28V, +3.3V, and Gnd

Filtered Feedthru

Mod InSMC Male

Reference Out

SMC Male

RF Output

SMA Female"Frequency Select" Control

TTL 30 bit binary word, Digital Modulation Input, Reset, and a
Latch control input through the 37 pin D sub connector.
See page 2 for pinout.

56A18993B

1 of 458A23120

64020-250-1ADMDFS-A"FREQUENCY SELECT" PIN OUT
37-PIN MALE D-SUB CONNECTORPINPIN1FS0220

FS1FS221

FS33FS422

FS54FS623

FS75FS824FS96FS1025

FS117FS1226

FS138FS1427

FS159FS1628

FS1710FS1829

FS1911FS2030

FS2112

FS2231

FS2313

FS2432

FS2514FS2633

FS2715

FS2834

FS2916Latch

35

Digital Modulation Input (Active High)17

Master Reset (Active High)36

Delta Frequency Latch

18

N/C

37

N/C

19Ground

56A18993B

LSB`

2 of 4MSB

58A23120

CONTROL WORD CALCULATIONS
The output frequency and step size is a function of the clock rate and the FREQUENCY SELECT (FS)data. The output frequency can be calculated from the formula:

FOUT (2 31 )FS[29:0] 1000 MHz

Where Fout is output frequency in MHz

The LATCH function (pin 16) is a TTL compatible input which is used to load new frequency
information into the driver. Frequency data is loaded into the driver when the signal on theLATCH pin goes from HIGH to LOW (falling edge).
The DELTA FREQUENCY LATCH function (pin 36) is a TTL compatible input which is used toload new data frequency information into the driver. For Delta frequency word, the same calculation
is used as the output frequency with negative values being entered in twos complement data is loadedon the falling edge.
Master RESET is a TTL active HIGH and resets the accumulator to zero, ie, no frequency output,
when a TTL HIGH is applied to pin 17. This is pulled LOW via. a 1 K resistor.

56A18993B

3 of 458A23120

For More Information, Contact: sales@goochandhousego.com www.goochandhousego.com
As part of our policy of continuous product improvement we reserve the right to change specifications at any time.

56A18993B

4 of 458A23120