SRS Model DG535 vs. QC 9520 Series
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| SRS Model DG535 |
QC 9520 Series |
Better |
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Number |
2 (4 edge outputs) |
2, 4 or 8 Width & Delay per Channel Outputs |
Yes! |
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Load |
50ohm or high impedance |
50ohm |
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Rise time |
3 ns typ |
3 ns typ |
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Slew rate |
1 V/ns |
0.5 V/ns |
Yes! |
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Overshoot |
<100mV + 10% of pulse amplitude |
<100mV + 10% of pulse amplitude |
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Levels |
TTL 0 to 4 VDC |
TTL 0 to 4 VDC |
4VDC w/ TZ50 module only |
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| -3 to +4 VDC with 10mV res. |
2.0 to 20.0 VDC with 10mV res |
Yes! |
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| 4 VDC max transition |
20.0 VDC max transition |
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Accuracy |
|
1ns + .0001 x setpoint |
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Number |
1 |
0|1|2 |
Yes! |
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Threshold |
TTL |
0.2 to 15 VDC |
Yes! |
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Maximum Input Voltage |
|
60 V Peak |
Yes! |
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Resolution |
|
10mV |
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Polarity |
Active High |
Active High/Active Low |
Yes! |
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Function |
Externally Triggered Pulse Inhibit |
Pulse Inhibit or Output Inhibit |
Yes! |
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Channel Behavior |
Global |
Global w/ Individual Channel Enables |
Yes! |
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Range |
0 - 1000s |
0 - 1000s |
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Resolution |
5 ps |
250 ps |
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Accuracy |
1500ps + timebase error x delay |
1000ps + timebase error x delay |
Yes! |
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Timebase |
25ppm |
25ppm |
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1ppm optional |
1ppm optional |
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RMS Jitter |
50ps + 10e-8 x delay |
400 ps |
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Trigger Delay |
85ns |
160 ns |
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Pulse Inhibit Delay |
Unknown |
130 ns |
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Output Inhibit Delay |
Unknown |
45 ns |
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Rate |
0.001 Hz to 1.000 MHz |
0.0002 Hz to 20.000 MHz |
Yes! |
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Resolution |
4 digits, 0.001 Hz below 10Hz |
5 ns |
Yes! |
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Accuracy |
Same as timebase |
Same as timebase |
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Jitter |
1:10,000 |
200 ps |
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Settling |
<2 seconds for any rate change |
1 cycle |
Yes! |
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Burst Mode |
2 - 32766 |
1 to 1,000,000 |
Yes! |
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Number |
2 (4 edge outputs) |
2, 4 or 8 Width & Delay Channel Outputs |
Yes! |
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Load |
50ohm or high impedance |
50ohm |
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Rise time |
2 - 3 ns typ |
3ns typ |
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Slew rate |
1 V/ns |
0.5 V/ns |
Yes! |
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Overshoot |
<100mV + 10% of pulse amplitude |
<100mV + 10% of pulse amplitude |
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Levels |
TTL 0 to 4 VDC |
TTL 0 to 4 VDC |
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VAR adjustable offset & amplitude |
VAR adjustable amplitude |
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Levels |
-3 to +4 VDC with 10mV res. |
2.0 to 20.0 VDC with 10mV res |
Yes! |
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|
4 VDC max transition |
20.0 VDC max transition |
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Accuracy |
|
1ns + .0001 x setpoint |
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Number |
n/a |
0, 2 or 4 |
Yes! |
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Rate |
n/a |
DC to 1/(0.2us + longest delay) |
Yes! |
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Threshold |
n/a |
0.2 to 15 VDC |
Yes! |
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Maximum Input Voltage |
n/a |
60 V Peak |
Yes! |
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Resolution |
n/a |
10mV |
Yes! |
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Impedance |
n/a |
1000 ohm |
Yes! |
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Function(s) |
n/a |
Individual Channel Gate/Trigger*/Follower* |
Yes! |
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Trigger Slope |
n/a |
Rising or Falling |
Yes! |
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Gate Polarity |
n/a |
Active High or Active Low |
Yes! |
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Trigger Jitter |
n/a |
<800 ps RMS |
Yes! |
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Number |
n/a |
2, 4 or 8 |
Yes! |
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Wavelength |
n/a |
820 nm or 1300nm |
Yes! |
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Number |
n/a |
0, 2, or 4 |
Yes! |
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Wavelength |
n/a |
820 nm or 1300nm |
Yes! |
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Communications |
RS232 (optional GPIB) |
USB/RS232 (optional Ethernet / GPIB) |
Yes! |
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Global Gates/Triggers |
1 Global only |
2 Global Gate/Trigger Inputs |
Yes! |
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Channel Gates/Triggers |
None |
Optical or Electrial (ea. Channel gate only) |
Yes! |
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External Clock In |
10MHz set |
User Selectable in discrete values (10 MHz - 100 MHz) |
Yes! |
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External Clock Out |
10MHz set |
User Selectable in discrete values (10 MHz - 100 MHz) |
Yes! |
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Command Set Compatibility |
None |
Backwards Compatible |
Yes! |
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Modular Design (combine outputs) |
None |
Yes |
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Dual Standard Input Module |
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I - Incrementing |
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Dual High Voltage (35-40 V) |
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Dual High Voltage (35-40 V) Extended Pulse Width |
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COM - Extended Communications (Ethernet & GPIB) |
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Dual Optical Output Module |
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Standard Dual TTL/Adjustable |
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Dual Optical Input Module |
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