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10
XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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1
J2 Output – Rate Out or Programmable Pulse Output
The Programmable Pulse Output (PPO) option (part number 87-8024) generates a precisely
synchronized trigger pulse at an arbitrary time and with arbitrary pulse width in integer multiples of 1
μ
S.
The start and stop edges of the PPO can be programmed with 1
μ
S resolution.
See “F111 – J2 Output (Rate, PPO)” on page 142.
J3 Input – Auxiliary Reference or Frequency Measurement
Auxiliary Reference (Aux Ref):
Rate:
1 PPS, 10 PPS, 100 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS, 5
MPPS, 10 MPPS, PPO (if PPO option is installed)
Duty cycle:
40-60%
±
10%
Amplitude (TTL):
TTL Levels into 50
Ω
Quantity:
1
Connector:
Female BNC
Factory Configuration:
The Rate Output is default 10 MPPS
Pulse Width:
Programmable in 1
μ
S steps
Start:
Rising
Stop:
Falling
Amplitude:
TTL levels into 50
Ω
Accuracy
Refer to
“System Time & Frequency Accuracy” on page 6
Frequency:
1, 5, 10 MHz
Amplitude:
1 Vp-p to 10 Vp-p at 1 k
Ω
to ground
Amplitude:
1 Vp-p to 3 Vp-p at 50
Ω
to ground
Impedance:
Configurable 1 k
Ω
or 50
Ω
to ground
SNR:
>20db
Quantity:
1
Connector:
Female BNC
Factory Configuration:
Disabled
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