CHAPTER THREE
ASCII
Character
HEX
Equivalent
Definition
(space) 20 < 1 microsecond
. 2E < 10 microseconds
* 2A < 100 microseconds
# 23 < 1 millisecond
? 3F > 1 millisecond (unknown)
3.3.13 IEEE-488 I/O INTERFACE MENU SCREEN (MODELS ET6000 AND ET6010
ONLY)
If the keyboard switch is pushed again, the LCD will display the IEEE-488 I/O Interface Menu
Screen, which is shown below. Although this screen is displayed, it is only applicable if the
TC&FG is configured and furnished with the IEEE-488 I/O Interface option, GPS Opt 14
(Assembly 55115).
Column:
1 5 10 15 20 25 30 35 40
| | | | | | | | |
<1> IEEE488 ADDR.17
Row 1
Row 2
If this option is provided, its Option Description will be located in Appendix C of this manual.
3.4 CONFIGURATION OF REAR PANEL BNC CONNECTORS J4-J9
The rear panel BNC connectors (J4 through J9) can be configured to output various timing
signals using the internal jumper pins and the front panel keyboard.
Per Figure 2-3 in Chapter Two, the following table details the various outputs available at J4:
JUMPER BLOCK J24 JUMPER BLOCK J14 OUTPUT AT J4
pins 1 and 2 shorted pins 1 and 2 shorted 1 of 16 selectable Channel 1 Mux outputs
pins 1 and 2 shorted pins 3 and 4 shorted IRIG B AC code out
pins 1 and 2 shorted pins 5 and 6 shorted 10MHz sine wave output
pins 1 and 2 shorted pins 7 and 8 shorted Tracking TTL output
pins 1 and 3 shorted pins 2 and 4 shorted Tracking (relay closure to ground)
3-26 ET6xxx ExacTime GPS TC & FG (Rev C) Symmetricom Inc
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