MS2601B是测试范围覆盖VHF/UHF视频频带的宽带频谱分析仪。使用高精度信号源的合成内部晶振和自动校准，用于高精度频率和电平测试。另外，MS2601B/K具有许多新功能，例如区域标记和滚动功能，可缩短测试时间。而且，插入式存储卡（PMCs）为存储测试条件和波形数据提供了优越的操作性。
技术指标
Model MS2601B
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y Measurement frequency range 9kHz to
Frequency
setting 0 to 2210MHz(stop frequency:≥1kHz)
Display
resolution 20Hz
Setting mode CENTER/SPAN,START/SPAN,START/STOP
Set frequency span(stop frequ.-start freq.)
to 2 digit value(10 to 98)
Frequency
display
accuracy ±(100Hz+freq.span*2%+displayfreq.*reference freq.accuracy)
For CENTER/SPAN or START/SPAN mode,after
auto-calibration,provided that freq.span
is≥10kHz and sweep timeis ≤100s
Frequency
span Setting range:1kHz to 2200MHzfor horizontal 10pisions,2-digit(10 to 98)variable,and 0Hz(fixed tuning)
1kHz to 2000MHz,1-2-5 sequence at step keys
Readout accuracy:±2%(sweep time≤100s)
Resolution Resolution bandwidth:30Hz to1MHz(3dB bandwidth),variable in 1-3 sequence,can be selected manually orautomatically
coupled to frequency span
Resolution bandwidth accuracy:±20%
Selectivity:≤15:1(ratio of 60dB and 3dB bandwidth)
Stability Residual FM:≤20Hz p-p/0.1s(frequencyspan;
≤500kHz)
Drift:≤300Hz/min(frequency span:≤500kHz,
sweep time;≤100s,after 1-hour warm-up at constant ambient temperature)

Sideband
noise ≤-80dBc(at 100Hz resolutionbandwidth,1Hz video bandwidth,10kHz from signal)
A
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p
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e Reference
oscillator Frequency:10Mhz
Stabillity
Starting characteristic:Within±5*10^-8
(after 20-minite warm-up,referred to
frequency after 1-hour warm-uo)
Aging rate:Within±2*10^-8/day,≤1*10^-7/
year (referred to frequency after
24-hour warm-uo)
Temperature characteristic:Within±5*10^-8(referred to frequency at 25℃
External reference input
Frequency:10MHz,Level:2 to 5Vp-p
Mark-
ers NORMAL Function:Displays frequencyat tunable
marker
Display accuracy:Same as center frequency display accuracy
Delta Function:Displays frequencydifference
between reference marker and tunable
marker
Display accuracy:Same as freqeuncy
span display accuracy
COUNT Function:Displays received signal
frequency at marker
Resolution:1Hz,10Hz,100Hz selectable
Accuracy:Display frequency*reference
freqeuncy accuray±(2 counts or 20Hz,
whichever is greater)
Measurement
range -130 to +20dBm
Display Divisions:
8 pisions on vertical axis when top
line is reference level and scale
is 10dB/p
10 pisions on vertical axis for
other scales
LOG(refered to reference level):
0 to -70dB(10dB/p),0 to -50dB(5dB/p),
0 to -20dB(2dB/p),0 to -10dB(1dB/p)
LIN:10% /p of reference level(cali-
brated in voltage.unit:V)
Linearity
LOG:±0.2dB/0 to -10dB,±0.3dB/0 to -20dB,
±0.5dB/0 to -50dB(resolution bandwidth of 100Hz to 1Mhz),±1dB/0 to -70dB(resolutionbandwidth of 100Hz to 100kHz),after
automatic calibration
LIN:±3% of reference level(fullscale)
Frequency response(20
°to 30℃) ±0.5dB(100kHz to 2.0GHz),±1.5dB(9kHzto 2.2Ghz),input ATT at 20dB
Refe-
rence level Setting range LOG:+20 to -100dBm(setting resolution0.1dB),2240mV to 2.20μV
LIN:2240mV to 70.8μV
Acc-
uracy ±0.3dB(0 to -50dBm),±0.75dB(+20to-70dBm)after automatic calibration at
frequency of 50MHz and fre-quency span≤2Mhz(resolution bandwidth,video
bandwidth,sweep time,and input ATT
settings at AUTO)
Resolution
bandwidth
swetching
deviation ±0.3dB(after automatic calibration
Dynamic range Average noise level ≤-120dBm(frequency 1Mhz to 2Ghz)wtih
0 dB input ATT,300Hz resolution
bandwidth,1Hz video bandwidth
2nd and 3rd harmonic dist-ortion ≤-75dB(frequency 5 to 800MHz)when
0dB input ATT and -30dBm input level
Residual response ≤-100dBm(frequenc ≥500kHz)when0
dB input ATT and 50Ω input termination
Marker Normal:Displays the level atsettable
marker
Delta:Display the difference in levels
between the settable marker and the
reference marker
Noise measurement:Both the power of
noise per 1Hz bandwidth(dBm/Hz,dBc/Hz),
and the adjacent channel power(dBm/ch,dBc/ch)can be measured.
Video
bandwidth 1Hz,10Hz,100Hz,1kHz,10kHz,OFF(selected
manually or automatically coupled to
resolution bandwidth)
Level unit dBm,dBμV(emf),dBμV/m
LOG/LIN
switching
loss ≤±1dB(after calibration at room
temperature)
Quasi-peak
detection 6dB bandwidth:200Hz,9kHz 120kHz±30%
(at room temperature)
Time constants for quasi-peak detection
Charge-time constant:500ms(for 6dB
bandwidth at 200Hz),160ms(for 6dB
bandwidth at 9kHz),or 550ms(for 6dB
bandwidth at 120kHz)
Display time constant:160ms(for 6dB
bandwidth at 200Hz and 9kHz),or
100ms(for 6dB bandwidth at 120kHz)
Linearity:±1dB(for -40 to 0dB
carrier wave signal,at room temperature)
Field
strength
measurement Antenna correction coefficientsfor
correct display and measurement of
field strengths(dBμV/m)can be se-lected
for certain antennas.Antenna correction
coeffi-cients have been stored in memory
for the following antennas:
MP543A/651A,MP635A/666A,MP414B