Directed Electronics PDG-2515/2520

PDG-2515/2520 Operating Manual

Page 27 MNPDG2515-2520R0.doc

modes will be discussed in more detail in section 9.0. Enabling and

disabling a channel can also happen on the fly in all modes except Burst

Mode. In Burst mode, enabling/disabling the channels is not available and

Channel 1 and 2 are enabled, Channel 3 and 4 are disabled automatically.

When the mode is switched from Burst mode, the enable/disable settings

will return to where they were previous to Burst mode. The trigger can be

set to internal or external in pulse generation and pulse count modes.

Note that the unit will “lock up” until it has finished it’s pulse count in

external mode so the external triggering device must give it AT LEAST as

many pulses as is entered. If this does not occur, the device can be

“released” by switching modes. The sync can also be run off any channel

except under Burst Mode. This is especially useful in Divide By N mode

and pulse count mode. Not that in Burst mode, the sync is a packet period

limited by at most 95% duty cycle regardless of this setting.

OUTPUT MENU2

OUTPUT MENU2 is where the unit can change the trigger, adjust the

contrast settings of the unit, and set the logic applied to the output of all

Channels. The operating modes will be discussed in more detail in section

9.0. The trigger can be set to internal or external in pulse generation and

pulse count modes. Note that the unit will “lock up” until it has finished it’s

pulse count in external mode so the external triggering device must give it

AT LEAST as many pulses as is entered. If this does not occur, the device

can be “released” by switching modes. The sync can also be run off any

channel when the unit is not in Burst mode (Note that in Burst mode, the

sync is a packet period limited by at most 95% duty cycle regardless of

this setting and outputs on Channel2 as well as the SYNC output.

The contrast setting can also be changed in this menu. If the contrast is

adjusted by using the encoder knob or using the x10 button, a ‘?’ will

appear at the end of the setting. This means that while the unit is powered

this is the setting that the unit will retain but when powered down and

powered up again the unit will revert to the last saved contrast. By

depressing the ENTER button the contrast will be saved in non-volatile

memory and the unit will come up under this contrast setting. The contrast

is has numerous settings, and a coarse and a fine adjust. The letter is a

course adjustment and the number is the fine adjust. The course adjust is

manipulated with the x10 button and the fine adjust is set by the encoder

knob. Logic allows the user to logically AND or OR outputs OUT1 and

OUT2 with each other and OUT3 and OUT4 with each other. LOGIC1 will

output on the OUT1 channel (note: the invert function will invert the

channel AFTER the logic has been applied – this is shown in the LOGIC

AND POLARITY FUNCTIONAL DIAGRAM below). LOGIC2 will output on

the OUT2 channel, LOGIC3 will output on the OUT3 channel, and

LOGIC4 will output on the OUT4 channel.