8.2 Event Inputs 61
8.2.5 Event Timer Input Channel Configuration
In order for the Model 1084A/B/C to receive a timing input, adjustments to both the hardware and
software configuration may be required. The hardware configuration is described in Section 5.2.2.
8.2.6 Firmware Setup
Reconfiguration of the firmware may also be required to allow measurement and display of event
time data and/or 1–PPS Deviation. See Figure 6.17 for detail on configuring the Event/Deviation
parameters from the front panel. See Section 9.2.2 for details on using the RS-232C interface to
manage event/deviation recording.
8.2.7 Displaying Data
Event and Deviation data can be accessed from either the front panel or via RS-232 com-
mands. The following paragraphs describe the steps required to access data using the front panel
EVENT/DEVIATION key. Press the EVENT/DEVIATION key and the display will enter a circu-
lar scroll. It begins by showing the data (if any is present) for Channel A, as previously configured
for Event Recording in Figure 6.17 and Section 9.2.2. The readout will display one of the records
(001 to 500) and associated event times, using the following format:
CH A EVENT #nnn TIME
ddd:hh:mm:ss.sssssss
Where:
“nnn” = event number (001 to 500)
“ddd” = day of year of the event (1 to 366)
“hh” = hour of the event (00 to 23)
“mm” = minute of the event (00 to 59)
“ss.sssssss” = second and fractional seconds of the event (e.g. 59.9999999)
Press the UP or DOWN key to scroll through all events presently stored in the event time
buffer. After exiting and re-entering the event display mode, the first event data displayed for a
given channel will correspond to the same event number as was last displayed for that channel.
However, the data itself may be changed if it has been overwritten.
To clear the event buffer, press the EVENT/DEVIATION key again, while viewing Event data.
This will cause the display to issue the following prompt:
CLEAR EVENT (A)?
UP=YES DOWN=NO
Press the UP key during this display to delete all of the records in the event buffer, and to
allow recording of new event times, starting with event number 000. NOTE: If the event capture
channel is not configured for event time recording, it will not display the CLEAR EVENT prompt.
If the event capture channel is configured for 1–PPS Deviation, the readout will display the
deviation of the 1–PPS input signal. In this case, the readout display will have the format:
A 1 PPS ±XXXXX.XX µS
SIGMA: XXXXX.XX µS
Where:
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