DOC 4380A
4380A O & M Manual
15
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
2.5.3 Input/Output Cards
The 4380A will operate with several different types of input and output cards. These cards can be operated
in any of the six slots. The unit will automatically detect and configure the system based on the card(s)
installed. The card slots are identified by slot number so the operator is capable of identifying the cards
physical location in the chassis. The view below is from the rear of the unit from left to right.
Slot 1
Slot 3
Slot 5
Slot 2
Slot 4
Slot 6
Figure 5 Rear Panel Output Card Locations
Each input/output card typically has four connectors with the port number identified as shown below in
Figure 4. See Appendix A for the specifications of each card.
Port 1 Port 2 Port 3 Port 4
Figure 6 Input/Output Cards
2.5.4 4394A (PPS/DC IRIG)
The factory default for this module provides two 1PPS outputs (Outputs 1 and 2) and two DC IRIG (B000)
outputs (Outputs 3 and 4).
The output types are user selectable/programmable. Users can change the signal types (PPS/DC IRIG), the
PPS signal parameters, and the IRIG signal types on individual output ports.
PPS:
Valid PPS settings are 1, 10, 100, 1K, 10K, 100K, 1M, and 10M PPS. To set the PPS
signal parameters use the
pps
command:
4380A> pps [slot#] [port#] [pulse period] [pulse width]
The following example sets the PPS on Slot 1, Port 2 to 1MPPS and the pulse width to 500 ns (1/2
the duty cycle).
4380A>pps 1 2 1e-6 5e-7
[OK] 2015-08-05T15:52:31Z
The following rules apply:
1.
PERIOD - period of pulse in seconds(max of 1, min of 1e-6)
2.
WIDTH - pulse width in seconds (minimum of 5e-7)
3.
For PPS Rates where the duty cycle is 10 µs or greater, the
pulse_width
must be a multiple of
10 µs, at least 10 µs wide, and at most half the duty cycle of the
pulse_period
.
4.
For PPS rates where half the duty cycle is less than 10 µs, the
pulse_width
must be exactly
one-half the
pulse_period
. (See example above.)
The system will generate an error message if the values are not correct or entered improperly.
Usage: <slot#> <port#> <pulse period> <pulse width>
[ERROR] 2015-08-05T15:53:07Z
To verify the settings use the
settings hardware:slots:N
command (where N=Slot #) to obtain the
current settings for a particular card.
4380A> settings hardware:slots:1
[4394A]
[ports]
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