Specifications

Model 2658

Frequency section

Frequency range

50kHz to 8.5GHz

Center frequency

Setting resolution

100kHz Allows rotary encoder, numeric key and function key

Accuracy

within ±(30+20T)kHz±1dot

T : Sweep time (s)

(frequency span : 200kHz to 10MHz, RBW : 30kHz, 23 ±5°C)

within ±(60+300T)kHz±1dot

T : Sweep time (s)

(frequency span : 20MHz to 8.5GHz, RBW : 100kHz, 23 ±5°C)

RBW frequency error

within ±6% of RBW (RBW : 3kHz, 30kHz) within ±30% of RBW (RBW : 100kHz to 3MHz)

Frequency span

Setting range

0Hz (zero span), 200kHz to 5GHz (1-2-5step) and 8.5GHz (full span)

Accuracy

within ±3% ±20TkHz ±1dot (Frequency span : 200kHz to 10MHz, 23 ±5°C) within ±3% ±200TkHz ±1dot (Frequency span : 20MHz to 8.5GHz, 23 ±5°C)

T : Sweep time (s)

Display resolution

Frequency span/250 Frequency span/1000 (only the measurement by RS-232C communication)

Display dot number

251dots, 1001dots (only the measurement by RS-232C communication)

(The unit displays data in 251 horizontal dots, but it internally captures the trace in 1001 dots)

Resolution bandwidth

3dB bandwidth

Setting range

3kHz to 3MHz (1-3step) and AUTO

Accuracy

within ±20%

Selectivity

1 : 12 (typical, 3dB : 60dB)

Video bandwidth

100Hz to 1MHz (1-3step), and AUTO

SSB Phase noise

-90dBc / Hz (typical, 100kHz offset, RBW : 3kHz, VBW : 100Hz, Sweep time : 0.3s)

Spurious response

less than -60dBc

Harmonics

less than -40dBc (100MHz to 8.5GHz)

Amplitude section

Reference level

Setting range

+10 to -60dBm (1dB step)

Accuracy

within ±0.8dB ±1dot (center frequency : 100MHz, RBW : 3MHz, VBW : OFF, ATT : 0dB, 23 ±5°C)

Unit

dBm, dBV, dBmV, dBµV, dBµV/m, dBµA/m

(dBµV/m and dBµA/m is used the measuring function)

Average noise level

-110dBm (typical, center frequency : 100MHz RBW : 3kHz, VBW : 100Hz)

Frequency Characteristic

within ±2.0dB ±1dot (50kHz to100MHz) within ±1.0dB ±1dot (100MHz to 8.5GHz)

Input impedance

50ohm

Input VSWR

less than 2.0

Input attenuator

Operating range

0 to 25dB (1dB step), coupled with reference level

Switching error

within ±0.6dB

RBW switching error

within ±0.6dB

Display resolution

0.4dB (10dB/div), 0.08(2dB/div)

Display dot number

200dot

Display scale

Scale

10dB / div, 2dB / div

Accuracy

within ±0.2dB / 2dB ±1dot within ±0.8dB / 10dB ±1dot within ±1.6dB / 70dB ±1dot

Input damage level

+23dBm (CW average power), 25VDC

Input connector

SMA (J)

Sweep section

Sweep time

Setting range

10ms to 30s (1-3step, frequency span : 0 to 2GHz) and AUTO 30ms to 30s (1-3step, frequency span : 5GHz) and AUTO

Accuracy

within ±0.1% ±1dot ( frequency span : 0 to 5GHz) within ±2.5% ±1dot ( frequency span : full span)

Trigger mode

AUTO (frequency span : zero span)

Detection mode

Positive peak, Negative peak, Sample

(when sweep time is 10ms or 30ms, only Sample can be set)

Functions

Marker

NORM :

displays frequency (7 digits max) and level (4 digits max) at marker point.

DELTA :

displays difference frequency and level between 2 markers.

Peak search

NORM :

searches a peak point within 10div. Available NEXT peak (10max).

ZONE :

searches a peak point within a zone designated by center and width. Marker moves to a peak point each sweep.

Calculation

NORM, MAX HOLD, MIN HOLD, AVERAGE, OVER WRITE * MAX/MIN HOLD : 2 to 1024 times, AVERAGE : 2 to 256

Measuring

Channel power, Adjacent channel power, Occupied frequency bandwidth, Electric field strength (needs optional antenna), Magnetic field strength (needs optional magnetic field probe) measurement.

AUTO tuning

When pressing AUTO TUNE key, the maximum level spectrum within 3.3GHz bandwidth is adjusted to center, and reference level, RBW, VBW and sweep time are adjusted to optimum values.

Save / Load

Save

Saves 100 traces and 100 setups

Load

Loads 1 trace and 1 setup

General

Communication

Interface

RS-232C

Baud rate

2,400 to 38,400bps

Hard copy

Allows direct hard copy with an optional printer

Display

Display

LCD

Backlight

CFL backlight

Resolution

320 (H) × 240 (V) dots

Power source

Battery

Ni-MH Battery

External DC source

Pin jack, DC5V / 4A

Other

Operating temperature

0 to 40°C (Guaranteed at 23 ±10°C, without soft carrying case)

Operating humidity

less than 40°C / 80%RH (Guaranteed at less than 33°C / 70%RH, without soft carrying case)

Storage temperature

-20 to 60°C, less than 60°C / 70%RH

Dimensions

162 (W) × 70 (H) × 260 (D) mm (exclude projections and stand)

Weight

approx. 1.7kg (included battery), approx. 1.5kg(without battery)