PeakTech 4055 Handbuch Seite 27

4.4.5 Output port
There are two output ports on the front panel of the instrument, users must not input signal to the output port
as a possibility of damaging the instrument.
4.4.6 Signal output port
* 【Output】：the signals that the instrument generates are all output from the signal output port, press
【Output】key to open or close the signal from the output port circularly.
* The output port is open when the "Output"light is on, and close when the "Output" is off. If wrongly
connect external high voltage to signal output port, instrument will suffer "inverse filling" danger, and then
instrument will turn on the protection function, close immediately signal output port and make an alarm
with the "Output"light off. In this case, you must check external load, only after eliminating the failure can
press【output】key to open signal output port.
4.4.7 Sync output port《 《 《 《 Sync》 》 》 》 ： ： ： ：
* output pulse wave compatible with TTL and CMOS, high level＞4V，low level ＜0.3V.
* A．Under single frequency function, sync signal is a square signal with TTL level, the frequency of sync
signal is the same as the frequency of the signal from《Output》port，when the phase is set to be
0° ，the phase of sync signal is the same as the phase of the signal from the 《Output》port. When the
phase is set to be 180° ，the phase of sync signal is the opposite of the phase of the signal from the
【Output】port.
* B．Under frequency sweep function, the sync signal is a pulse signal with TTL level，the rising edge of
the pulse wave match along with the start point of the sweep, and the falling edge of the pulse wave
match along with the middle point of sweep range, the period of pulse wave is the same as sweep time.
4.5 Programmable interface
* There is an USB device interface socket 【USB Device】 on the rear panel of the instrument, through
which the instrument could be program-controlled by connecting to computer with an USB cable.The use
method of this interface is described in detail in the CD that attached with the instrument.
4.6 Parameter calibration
* The instrument is calibrated before shipment, but some specifications may change a bit lot during long
time of use. To ensure the accuracy, the instrument should be calibrated termly.
* Users may regain the accuracy of the instrument by operating the keyboard to calibrate the main
specifications without removing the cover of the instrument.
4.6.1 Enable calibration
* After booting, the calibration is in off state, and the generator could not be calibrated without inputting
calibration password, this is a way to protect calibrated parameters which may be changed carelessly.
* To enable calibration, select sine wave and then press 【Cal】-key, the calibration password displayed
as 0, input calibration password 1900, press 【N】-key to enable calibration.
4.6.2 Parameters calibration
* Press 【Menu】-key to display calibration value on the left, and calibration sequence number on the right
when setting calibration conditions automatically.
* Adjust calibration value to calibrate present selected calibration option and make the output expected.
* Continue to press 【Menu】-key and the calibration sequence number will increase step by step, users
could calibrate all those options respectively, which is shown in the following list.
* During calibration process, press【Cal】-key at any time then press 【Menu】-key to return the
calibration sequence number to 00.
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