NF WAVE FACTORY WF1967, Инструкция по эксплуатации

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1.2 Operating Principles
WF1967/WF1968
1-5

The maximum output voltage of this product is 20Vp-p, 4Vp-p or 800mVp-p depending on
whether or not the 1/5x ATT or the 5x amp is used. Correspondingly, the external addition
gain changes to 10x, 2x or 0.4x.

Diagram: WF1968Block Diagram
2.5ppm VCTCXO
30MHz
SYSTEM
CONTROLLER
(CPU, ROM, RAM,
REMOTE I/F,
MISC LOGIC)
AC/DC
DC/DC
for LOGIC
（シャーシ電位）
FAN
POWER
PWR
CNTL
EN
DC/DC
DC/DC
for ANALOG
(CH1)
for ANALOG
(CH2)
+12V
アイソレーション
CH1
CH2
Analog ch1
部
10MHz REF IN
REF OUT
TRIG IN CH1
TRIG IN CH2
USB GPIB
～ LINE
100
～
230V
FCTN
OUT
SYNC/SUB
OUT
MOD/ADD
IN
外部変調 /
外部加算
切換え
各種同期 /
スイープ
X
ドライブ /
副波形出力
切換え
PWR AMP
PG AMP
COMPARATOR
840MS/s
16bit 2ch
D/A
×
2
オーバ
サンプリング
D/A
OFFSET
VCO,
PLL
400kHz BW
1Mw
SSRAM
波形メモリ
16Mbit
±
10V
100MHz BW
0/-10/-20/-30dB
LPF
±
1V
ATT
MAIN
ANALOG
DDS
FPGA
D/A
Vref
Ref
16
16
CONT
ANALOG CONT.
約
2.2MS/s
TTL/
±
3V
LPF
LPF
A/D
FRONT
PANEL
UNIT
USB
MEMORY
LAN
(option)
MULTI I/O
Figure 1-2 WF1968 Block Diagram

The external modulation signal passes through the LPF, is converted from analog to digital by
the A/D and then input into the DDS.

The Analog section is insulated from the System Controller section which is grounded in the
potential of the enclosure.

The WF1968 has two channels with independent Analog sections that are insulated from the
potential of the enclosure.

System Controller

This section controls the display, panel key, remote control (GPIB, USB, LAN(Option)),
trigger input, frequency reference, DDS, amplitude, and DC offset.

A 30MHz crystal oscillator is used for DDS clock.
Waveform
memory
Isolation
Approx. 2.2 MS/s
×2 over
sampling
External
modulation/
External
addition
switching
Each type of
synchronization/
sweep X drive/
sub waveform
signal switching
Analog CH2 section
Analog CH1 section
(Chassis potential)