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Specifications – Atec Rohde-Schwarz-SML03 User Manual

Page 8

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Signal Generator ¸SML

8

Specifications

Specifications apply under the following conditions:
15 minutes warmup time at ambient temperature, specified environmental
conditions met, calibration cycle adhered to, and total calibration performed.
Data designated “nominal” apply to design parameters and are not tested.
Data designated “overrange” are not warranted.
Warranted specs do not apply to the Extended Divider Range mode.

Frequency

Range

9 kHz to 1.1 GHz

¸SML01
¸SML02
¸SML03

9 kHz to 1.1 GHz
9 kHz to 2.2 GHz
9 kHz to 3.3 GHz

Resolution

0.1 Hz

Resolution of synthesis
(standard, f <1.1 GHz)

<0.5 µHz

Setting time (for an offset of <1 × 10

−7

or <90 Hz for f

≤76 MHz)

after

IEC/IEEE-bus delimiter

<10 ms

Reference frequency

Standard

Option ¸SML-B1

Aging (after 30 days of operation)

<1 × 10

−6

/year <1 × 10

−7

/year or

<5 × 10

−10

/day

Temperature drift (0°C to 55°C)

<1 × 10

−6

<2 × 10

−8

Output for internal reference

Frequency
Output voltage, V rms, sinewave
Source impedance

10 MHz
>0.5 V into 50

50

Input for external reference

Frequency
Permissible frequency drift
Input voltage, V rms, sinewave
Input impedance

10 MHz
5 × 10

–6

0.5 V to 2 V into 50

50

Spectral purity

Spurious signals

Harmonics (for f >100 kHz)

1)

¸SML01
¸SML02/03
Subharmonics

f

≤1.1 GHz

f >1.1 GHz

Nonharmonics
(carrier offset >10 kHz)

f

≤1.1 GHz

f >1.1 GHz to 2.2 GHz
f >2.2 GHz to 3.3 GHz

<

−30 dBc at levels ≤+10 dBm

<

−30 dBc at levels ≤+8 dBm

none
<–50 dBc

<–70 dBc
<–64 dBc
<–58 dBc

Broadband noise

2)

(f = 1 GHz,

carrier offset >2 MHz, 1 Hz bandwidth) <

−140 dBc, typ. −150 dBc

SSB phase noise (f = 1 GHz, 20 kHz
carrier offset, 1 Hz bandwidth)

<

−122 dBc, typ. −128 dBc

Residual FM, rms (f = 1 GHz)

0.3 kHz to 3 kHz
0.03 kHz to 20 kHz

<4 Hz, typ. 1 Hz
<10 Hz, typ. 3 Hz

Residual AM, rms (0.03 kHz to 20 kHz) <0.02%

Level

Range

–140 dBm to +13 dBm

2)3)

(overrange +19 dBm)

Resolution

0.1 dB

Level accuracy

2)4)

(level >–120 dBm)

¸SML01 (for f >100 kHz)
¸SML02/03

100 kHz to

≤2 GHz

f >2 GHz

<0.5 dB

<0.5 dB
<0.9 dB

Frequency response at 0 dBm

2)4)

¸SML01 (for f >100 kHz)
¸SML02/03

100 kHz to

≤2 GHz

f >2 GHz

<0.5 dB, typ. 0.3 dB

<0.7 dB
<1.0 dB

Characteristic impedance

50

VSWR

¸SML01
¸SML02/03

100 kHz to 1.5 GHz
f

>1.5 GHz

<1.5

typ. 1.6
typ. 2.3

Setting time (IEC/IEEE bus), f >100 kHz <10 ms, typ. 5 ms

Non-interrupting level setting
(for f >100 kHz)

5)

20 dB, overrange 30 dB

Overvoltage protection

safeguards unit against externally
applied RF power and DC voltage
(50

Ω source)

Max. permissible RF power

f

≤2.2 GHz

f >2.2 GHz

50 W
25 W

Max. permissible DC voltage

35 V

Internal modulation generator

Frequency range

Resolution

0.01 Hz to 1 MHz
0.01 Hz

Frequency accuracy

same as for reference frequency +
2.4 × 10

−3

Hz

Frequency response
(up to 500 kHz, level >100 mV)

<0.5 dB

THD (up to 100 kHz, level 4 V,
R

L

= 600

Ω)

<0.1%

Open-circuit voltage V

p

(LF connector)

Resolution
Setting accuracy (at 1 kHz)

1 mV to 4 V
1 mV
1% of V

p

+ 1 mV

Output impedance

approx. 10

Frequency setting time (after reception
of last IEC/IEEE-bus character)

<10 ms

Simultaneous modulation

AM, FM/

ϕM and pulse modulation

Amplitude modulation

6)

Operating modes

internal, external AC/DC,
internal/external two-tone

Modulation depth

0% to 100%,
settable modulation depth continuously
decreasing between +7 dBm and
+13 dBm

7)

while adhering to AM speci-

fications; a status message is output
when modulation depth is too high

Resolution

0.1%

Setting accuracy at AF = 1 kHz
(m <80%)

8)

<4% of reading +1%

AM distortion

8)

at AF = 1 kHz

m = 30%
m = 80%

<1%
<2%

Modulation frequency range (<3 dB)

DC/10 Hz to 50 kHz

Incidental

ϕM at AM (30%),

AF = 1 kHz

<0.2 rad

Modulation input EXT

Input impedance
Input voltage V

p

for set

modulation depth

>100 k

1 V