
CLOCK SIGNAL DISTRIBUTION AMPLIFIER
The CSDA-1 is a high performance clock signal distribution and isolation amplifier. The device is used to provide distribution of 1 PPS, 5 MHz and 10 MHz signals. The CSDA-1 is a modular unit implemented with customizable functionality with different options. The pulse distribution modules can drive 50-ohm cables. The phase noise of the RF distribution modules is exceptionally low with excellent channel-to-channel isolation. Each module contains an output level monitor LED located on the front panel. Inputs and outputs are matched to 50 ohms to obtain better than 25 dB return loss. All RF outputs are AC coupled and the grounds are DC isolated to reduce the effect of ground loops.
All options include AC and DC operation.

- Features
- Applications
- Specifications
- Options
- Distributes:
- 1 PPS, 5 MHz & 10 MHz signals
- High Isolation
- Low phase noise
- Very good stability
- Signal fault alarm
- AC and DC voltage operation
- Clock signal applications
- Atomic frequency standards
- Atomic time scales
- Laboratory frequency distribution
- Reference frequency distribution
- Time synchronization
PPS Module
PARAMETER |
CONDITIONS |
TYP |
UNITS |
Rise time |
10 - 90 % |
0.8 |
ns |
Fall time |
10 - 90 % |
0.8 |
ns |
Propagation delay |
50 Ohm load |
7 |
ns |
Differential delay |
channel - channel |
100 |
ps |
Impedance |
input output |
50 10 |
Ohms |
Input High level Input Low level |
Input signal into 50ohm load Input signal into 50ohm load |
2 to 5 -0.7 to 0.8 |
V
|
Output High level Output Low level |
50 ohm load 50 ohm load |
2.4 0.4 |
V |
Input signal level |
1 MHz, 5 MHz and 10 MHz |
+7 |
dBm |
External Sync. Error |
1 MHz 5 MHz 10 MHz |
+/- 500 +/- 100 +/- 50 |
ns |
Temp-delay coefficient |
0 - 50 ºC
|
3
|
ps/ºC |
5 MHz Module
PARAMETER |
CONDITIONS |
TYP |
UNITS |
Input level |
1 dB compression |
18 |
dBm |
Bandwidth |
+/- 1 dB |
0.5 - 65 |
MHz |
Gain |
@ 5 MHz |
0.5 |
dB |
Impedance |
input output |
50 50 |
Ohms |
Return loss
|
input (S11) 5 MHz output (S22) 5 MHz |
-35 -25 |
dB |
Distortion |
+13 dBm +17 dBm |
-48 -42 |
dBc |
Isolation |
output to output output to input |
140 145 |
dB |
Phase noise |
1 Hz 10 Hz 1 kHz 10 kHz |
-155 -165 -170 -171 |
dBc/Hz |
Temp-delay coefficient |
0 - 50 ºC |
1.2 |
ps/ºC |
Product Name | Description |
---|---|
CSDA-1 |
Module 1 = 1PPS Input – Five Buffered Outputs |
CSDA-1A |
Module 1 = 1PPS Input – Five Buffered Outputs |
CSDA-1B |
Module 1 = 1PPS Input – Five Buffered Outputs |
CSDA-1C |
Module 1 = 1PPS Input – Five Buffered Outputs |
CSDA-1D |
Module 1 = 1PPS Input – Five Buffered Outputs |
CSDA-1E |
Module 1 = 1PPS Input – Five Buffered Outputs |