Universal Counters SC-721x Series/SC-720xH Series/SC-720x Series FAQ

SC-7217A / SC-7217/ SC-7215A / SC-7215



Q. Where is the USB driver?
A. It is installed with Iwatsu Test Instruments Tools from the website downloads.

(Compatible models: SC-7217/SC-7215)

Q. What is the frequency count method?
A. Reciprocal counting.

(Compatible models: SC-7217/SC-7215)

Q. I cannot measure 1Hz at the 10 second gate.
A. Set the GATE_CLOSE of the measurement [MEASURE] ([2nd + TRIGLVL]) menu to WAIT.

(Compatible models:SC-7217A / SC-7217/ SC-7215A / SC-7215)

Q. When I use remote, the device is placed on hold.
A. You can release the hold mode by sending the FRUN ON command.

(Compatible models:SC-7217 / SC-7215)

Q. There is no key to measure peak voltage.
A.Use the MEASURE menu to set it.
Press [2nd], [TRIG LVL], and in the menu, VPP: Set the channel that you want to measure to ON. Press the [MODE] key to peak.

(Compatible models:SC-7217 / SC-7215)

Q. * Items that are initialized by the RST command
A.Use the MEASURE menu to set it.
The items in the table "Target of save/call" in the user manual "3.3 Backup of settings" that are shown as ○

(Compatible models:SC-7217 / SC-7215)

Q. What is the reference oscillator accuracy?
A. ± 2.5ppm.
(Standard for temperature characteristics in the range of 0 to +40°C)

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. What is 1 reference time for measurement error?
A. It is 0.1μs, which is the cycle of the reference oscillator 10MHz.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. Is there an optional 10:1 probe for counters?
A. Unlike the oscilloscope, there is no dedicated probe because the phase cannot be adjusted by looking at the screen. If the measured signal is a sinusoidal waveform, a 10:1 probe for the oscilloscope can be used.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. No Signal sometimes displays.
A. No Signal is displayed if the signal disappears before the gate opens. When the gate is open, the count remains when the signal disappears.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. Can I change the power supply voltage?
A. Yes, but it is a factory pick-up option.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. When I use remote, the device is placed in hold mode.
A. The device is designed to enter hold mode in remote.
The SC-720xH Series can be released from hold mode by sending the :FRUN ON command.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. There is no key to measure peak voltage.
A. The peak voltage can be measured by the following operations. Press the "STAT" key and the ">>" key to set Vpp A = on B = on, and then press the "MODE" key several times to switch the display.

(Compatible models: SC-720xH Series, SC-720x Series common)

Q. Can CH-B measure frequency?
A. It is possible with SC-7207H and SC-7205H. It is not possible with the SC-7207 or SC7205 models.

(Compatible models:SC-7207H / SC-7205H / SC-7207 / SC-7205)

Q. I want to measure the time interval of a single signal.
A. Use the pulse width measurement function to measure the time interval from rise to fall or from fall to rise.
If you want to measure the time from rise to rise or from fall to fall, branch the signal and enter CH-A and CH-B. In this case, the stop-inhibit function can be used in conjunction to avoid unwanted problems.

(Compatible models:SC-7207H / SC-7205H / SC-7207 / SC-7205)

Q. In the time interval measurement, when I send the *TRG command using GPIB remote when the gate is open and the measurement is not completed, hang up occurs.
A. For SC-7207H/7206H/7205H, set the GATE_CLOSE setting of the SYSTEM menu to FAST. When the set internal gate time has passed about 1 second, if the measurement has not been completed, it is forced to terminate.
For SC-7207/7206/7205, perform GPIB device clear.
We recommend that you incorporate timeout error processing on the application software side.

(Compatible models:SC-7207H / SC-7205H / SC-7207 / SC-7205)

Q. The same signal is input to CH-A and CH-B, but the phase difference is not measured at 0°.
A. Phase difference 0° cannot be measured. A time difference of at least 6ns is required.

(Compatible models:SC-7207H / SC-7205H / SC-7207 / SC-7205)

Q. I want to perform pendulum operation only once by time interval measurement.
A. Measure in hold mode. Press the "HOLD" key to illuminate the lamp, and press it again to activate the pendulum.

(Compatible models:SC-7207H / SC-7205H / SC-7207 / SC-7205)