<p>2SB is Dual Sideband, as opposed to DSB - Double Sideband. Here are a couple of papers you might find relevant and interesting:</p>
<p><a href="http://www.nrao.edu/meetings/isstt/papers/2009/2009257260.pdf" rel="nofollow noreferrer">a 2SB upgrade replacing a DSB</a></p>
<p><a href="http://www.das.uchile.cl/lab_mwl/doc.pdf/dsss_rfinger_uchile.pdf" rel="nofollow noreferrer">a paper that mentions the advantages of 2SB over DSB</a></p>
<p>Answers to <a href="https://dsp.stackexchange.com/q/69815/25659">What is the functional difference between DSB and 2SB mixers, and why exactly would 2SB be better for radio astronomy?</a> in Signal Processing SE go into further detail.</p>

CC BY-SA 4.0
2020-08-16T22:40:18.523Z
Wow, this is a bit of a blast from the past. You are right, I could have answered that better. Six years on I'm feeling a bit of a lack of motivation to address it, but if you have suggestions for edits of the answer I am happy to work with them. Or feel free to add your own answer to improve on this one
Jeremy
CC BY-SA 4.0
2020-08-18T00:45:43.850Z
OK, I don't know what the policy is on pointing to answers on other stack exchange subsites
Jeremy
CC BY-SA 4.0
2020-08-20T01:49:31.400Z
Thanks for the update! I've made a small edit, I hope this is okay.
uhoh
CC BY-SA 4.0
2014-05-22T11:08:19.390Z
2020-08-20T01:48:34.240Z
2020-08-20T01:48:34.240Z
Jeremy
<p>In literature about the instrumentation of radio astronomy, I frequently come across a type of mixer described as "2SB".  I'm familiar with single-sideband (SSB) and double-sideband (DSB) mixers, but I have never studied a 2SB mixer.</p>

<p>What is a 2SB mixer and how does it compare to a DSB mixer?  Ideally, I would also like to know of formal references that directly address the topic for further reading.</p>

CC BY-SA 4.0
2020-08-15T07:20:22.650Z
the answer to [What would a “crystal mixer” have been in an 1960's radio telescope at 960 MHz?](https://ham.stackexchange.com/q/16925/8643) remarks that the IF bandpass is quite wide and reasonably speculates that this is related to maintaining a flat phase response for this interferometric radio telescope. Since the IF is centered on the frequency difference, I assume both sidebands are passed.
uhoh
CC BY-SA 4.0
2020-08-15T07:20:26.460Z
I don't know if this is officially a Dual Sideband or a Double Sideband or something else, partly because the accepted answer doesn't actually say anything about what those mean nor what the difference is between.
uhoh
<radio-astronomy><instruments>
2SB mixer in radio astronomy?
DakotaD
# 2SB mixer in radio astronomy?

(Asked by: username_0 on 2014-05-21)

In literature about the instrumentation of radio astronomy, I frequently come across a type of mixer described as "2SB". I'm familiar with single-sideband (SSB) and double-sideband (DSB) mixers, but I have never studied a 2SB mixer.

What is a 2SB mixer and how does it compare to a DSB mixer? Ideally, I would also like to know of formal references that directly address the topic for further reading.

**Tags:** radio-astronomy, instruments

> **Comments:**
> **username_1**: the answer to [What would a “crystal mixer” have been in an 1960's radio telescope at 960 MHz?](https://ham.stackexchange.com/q/16925/8643) remarks that the IF bandpass is quite wide and reasonably speculates that this is related to maintaining a flat phase response for this interferometric radio telescope. Since the IF is centered on the frequency difference, I assume both sidebands are passed.  
> **username_1**: I don't know if this is officially a Dual Sideband or a Double Sideband or something else, partly because the accepted answer doesn't actually say anything about what those mean nor what the difference is between.  

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## 1 answers

### Answer by username_2 on 2014-05-22. Score: 4 | Accepted answer

2SB is Dual Sideband, as opposed to DSB - Double Sideband. Here are a couple of papers you might find relevant and interesting:

[a 2SB upgrade replacing a DSB](http://www.nrao.edu/meetings/isstt/papers/2009/2009257260.pdf)

[a paper that mentions the advantages of 2SB over DSB](http://www.das.uchile.cl/lab_mwl/doc.pdf/dsss_rfinger_uchile.pdf)

Answers to [What is the functional difference between DSB and 2SB mixers, and why exactly would 2SB be better for radio astronomy?](https://dsp.stackexchange.com/q/69815/25659) in Signal Processing SE go into further detail.

> **Comments:**
> **username_2**: Wow, this is a bit of a blast from the past. You are right, I could have answered that better. Six years on I'm feeling a bit of a lack of motivation to address it, but if you have suggestions for edits of the answer I am happy to work with them. Or feel free to add your own answer to improve on this one  
> **username_2**: OK, I don't know what the policy is on pointing to answers on other stack exchange subsites  
> **username_1**: Thanks for the update! I've made a small edit, I hope this is okay.  

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