5.16. Input port
There are three input ports on the rear panel of the generator, which could only be used as
external signal input port, and not signal output port.
5.16.1. Modulation input port
《
《
《
《
Modulation In
》
》
》
》
Input external modulation signal under FM, AM, PM and PW M functions.
5.16.2. Trigger input port
《
《
《
《
Trig In
》
》
》
》
Input external trigger signal under FSK, frequency sweeping and burst functions.
5.16.3. Count input port
《
《
《
《
Count In
》
》
》
》
Input external signal to be tested under frequency measurement function.
5.17. Communication port
5.17.1. USB device interface
《
《
《
《
USB Device
》
》
》
》
The instrument could be program-controlled by connecting to computer through this interface with
an USB cable, or down user-defined waveform data with waveform edition software, or update the
firmware program of the generator with firmware updating software, the use method of this
interface is described in detail in the CD that attached with the instrument.
5.17.2. USB host port
《
《
《
《
USB Host
》
》
》
》
Plug in an U disk, to store and recall the user-defined waveforms and setting parameters of the
generator.
5.18. 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.
5.18.1. 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
【
Shift
】【
Cal
】
key,
the calibration password displayed as 0, input calibration password 1900, press
【
#
】
key to
enable calibration. If currently the generator is under CHA tone function, you may calibrate CHA,
and if under CHB tone function now, you may calibrate CHB.
5.18.2 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
【
Shift
】 【
Cal
】
key at any time then press
【
Menu
】
key to return the calibration sequence
number to 00.
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