MP7505 Series User Manual
wave with a 50% duty cycle. In the first half of the modulation waveform,
the sync signal is TTL high. When external modulation is performed, there is
no sync signal output.
For ASK, FSK, PSK, BPSK, QPSK, 3FSK, 4FSK, the synchronization signal is
referenced to the keying frequency, and the synchronization signal is a
square wave with a duty cycle of 50%. There is no sync signal output during
external modulation.
For OSK, the sync signal is referenced to the keyed frequency and the sync
signal is a square wave with a 50% duty cycle. When the internal crystal
oscillator starts, the sync signal is TTL high.
For N-cycle bursts, the sync signal is TTL high at the beginning of the burst.
At the end of the specified number of cycles, the sync signal is TTL low (if the
waveform has an associated start phase, it may not be a zero crossing). For
an infinite count pulse train, the sync signal is the same as the sync signal of
the continuous waveform.
For external gated bursts, the sync signal follows its gate signal. Note: This
signal does not become TTL low until the end of the last cycle (if the
waveform has an associated starting phase, it may not be a zero crossing).
Load
For either of Out1 and Out2 connector at the front panel, the generator has a 50Ω
fixed serial output impendence. If the actual load does not match the specified value,
the voltage level displayed would not match the voltage level of the component
under test. This function is used to match the displayed voltage with the expected
one.
The step to set the CH1 or CH2 load value is as follows:
(1) Press the Utility function key, press the CH1/2 Set softkey.
(2) Press the CH1Load or CH2Load softkey, press it again to select High Z or * ohm
("*" represents a value, the default is 50Ω).
(3) To change the load value, after selecting * ohm, turn the rotary control to adjust
the value on the current cursor, use the / direction key to move cursor
left or right, or use the numeric keypad to enter the parameter and then select
unit. The load range is 1ohm to 10kohm.
Warning: Setup the correct load for right application.
I/O Setup
The generator is configured with USB and LAN interfaces and supports users to
configure the interface settings for remote communication. Press Utility →
I/O Setup to open the I/O setting menu, and set the USB device type or the LAN
interface setting for remote communication.
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